Freightliner advises against driving your coach with the air bags deflated. This is due to the geometry of the drive train when the air bags are deflated. The short drive shaft on a diesel pusher may actually arch up slightly with the bags deflated, which could cause the drive shaft knuckle to interfere with the frame or flooring, causing damage to the drive shaft.
Note that this problem is more severe with FL chassis's with the old wishbone rear control arms, which caused the drive shaft to angle up much more when the air bags were deflated. The newer suspensions which are connected to the frame both in front and behind of the axle does not change the drive shaft geometry as much when the air bags are deflated.
With all that said, I have heard of many people who deflate their air bags and then 'creep' into their storage building with no harm done.
'07 Winnebago Journey 34H - CAT C7, Koni's, MCU's, SS Bell Crank, Safe-T-Plus
'07 HHR Toad, SMI AFO, Blue OX